This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A068243 #12 Apr 27 2012 17:46:42 %S A068243 1,20934997854,19278946338342653286,112656664890078627543093640, %T A068243 20043672552286729048799884311015, %U A068243 361011452813936865714801000277216206,1332266848133993021484807934080054103804,1550797305138088176220498521209275420942656 %N A068243 1/2 the number of colorings of a 7 X 7 square array with n colors. %H A068243 Alois P. Heinz, <a href="/A068243/b068243.txt">Table of n, a(n) for n = 2..1000</a> %H A068243 Alois P. Heinz, <a href="/A068243/a068243.txt">Formula for a(n)</a> %Y A068243 Cf. A068239-A068305, A000332, A002417, A027441, A182368, A182406. %K A068243 nonn %O A068243 2,2 %A A068243 _R. H. Hardin_, Feb 24 2002 %E A068243 More terms from _Alois P. Heinz_, Apr 27 2012